. passport lines long and airports jammed. thursdaytheu.s. governmentofferedtoevacuateu.s. citizens.>> i'm concerned because i really doesn't know the situation about the radiation. it keeps changing. >> reporter: many japanese are fleeing the stricken northeast region and moving to shelters like this one in the northwest. here they found a place on the floor to sleep and a little bit of food. but the misery from the original disaster still hangs heavy over much of japan. new video of the tsunami shows the terror the water rushed higher and relief as neighbors rescued neighbors. thank you, this woman says. i thought i was going to die. japan's top government spokesman says the country is now willing to accept help from the u.s. military in tackling the nuclear crisis and are examining exactly what next action step to take. >>> detecting a plume of radioactive particles over the pacific ocean tonight from japan and tiny particles are already falling in the bay area. this as public health officials down play a plume descending on california. that plume is being monitored by stations